FR3138840B1 - Method for determining a minimum impedance of a detectable fault by means of an analysis of a cable by reflectometry - Google Patents

Method for determining a minimum impedance of a detectable fault by means of an analysis of a cable by reflectometry Download PDF

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Publication number
FR3138840B1
FR3138840B1 FR2208196A FR2208196A FR3138840B1 FR 3138840 B1 FR3138840 B1 FR 3138840B1 FR 2208196 A FR2208196 A FR 2208196A FR 2208196 A FR2208196 A FR 2208196A FR 3138840 B1 FR3138840 B1 FR 3138840B1
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France
Prior art keywords
determining
cable
measurement
fault
reflectometry
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FR2208196A
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French (fr)
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FR3138840A1 (en
Inventor
Louise Revault
Josy Cohen
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique CEA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Priority to FR2208196A priority Critical patent/FR3138840B1/en
Priority to PCT/EP2023/070152 priority patent/WO2024033044A1/en
Publication of FR3138840A1 publication Critical patent/FR3138840A1/en
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Locating Faults (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

Méthode de détermination d’une impédance minimale d’un défaut détectable au moyen d’une analyse d’un câble par réflectométrie, la méthode comprenant les étapes de : Réaliser (301) une mesure, appelée réflectogramme, de la réponse impulsionnelle temporelle d’un signal de référence propagé dans le câble à partir d’un point d’injection puis rétro-propagé en un point de mesure,Déterminer (302) un seuil de détection de pics d’amplitude dans le réflectogramme, le seuil étant proportionnel à l’écart type de la mesure,Déterminer (303) une estimée de l’atténuation du signal à partir de la mesure, l’atténuation étant considérée constante le long du câble,Déterminer (304) une estimée du coefficient de réflexion du signal sur un défaut caractérisé par une amplitude dans le réflectogramme égale au seuil de détection, à partir de l’atténuation du signal et de la mesure,Déterminer (305) une estimée de l’impédance caractéristique dudit défaut, égale à l’impédance minimale d’un défaut détectable. Figure 3Method for determining a minimum impedance of a detectable fault by means of an analysis of a cable by reflectometry, the method comprising the steps of: Carrying out (301) a measurement, called a reflectogram, of the temporal impulse response of a reference signal propagated in the cable from an injection point and then back-propagated to a measurement point,Determining (302) a threshold for detecting amplitude peaks in the reflectogram, the threshold being proportional to the standard deviation of the measurement,Determining (303) an estimate of the attenuation of the signal from the measurement, the attenuation being considered constant along the cable,Determining (304) an estimate of the reflection coefficient of the signal on a fault characterized by an amplitude in the reflectogram equal to the detection threshold, from the attenuation of the signal and the measurement,Determining (305) an estimate of the characteristic impedance of said fault, equal to the minimum impedance of a detectable defect. Figure 3

FR2208196A 2022-08-09 2022-08-09 Method for determining a minimum impedance of a detectable fault by means of an analysis of a cable by reflectometry Active FR3138840B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR2208196A FR3138840B1 (en) 2022-08-09 2022-08-09 Method for determining a minimum impedance of a detectable fault by means of an analysis of a cable by reflectometry
PCT/EP2023/070152 WO2024033044A1 (en) 2022-08-09 2023-07-20 Method for determining a detectable minimum impedance of a fault by means of an analysis of a cable by reflectometry

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2208196A FR3138840B1 (en) 2022-08-09 2022-08-09 Method for determining a minimum impedance of a detectable fault by means of an analysis of a cable by reflectometry
FR2208196 2022-08-09

Publications (2)

Publication Number Publication Date
FR3138840A1 FR3138840A1 (en) 2024-02-16
FR3138840B1 true FR3138840B1 (en) 2024-08-09

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FR2208196A Active FR3138840B1 (en) 2022-08-09 2022-08-09 Method for determining a minimum impedance of a detectable fault by means of an analysis of a cable by reflectometry

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FR (1) FR3138840B1 (en)
WO (1) WO2024033044A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118746778B (en) * 2024-07-12 2025-10-10 西安交通大学 Cable defect assessment method, equipment and medium based on positioning curve attenuation compensation
CN119064720B (en) * 2024-10-28 2025-04-01 南京苏缆电缆制造有限公司 Accurate positioning system of cable trouble
CN120507606B (en) * 2025-07-17 2026-02-10 武汉武高电测电气有限公司 Cable fault detection method and device based on intelligent cable fault testing device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7139668B2 (en) * 2003-05-12 2006-11-21 Simmonds Precision Products, Inc. Wire event detection
FR3006769B1 (en) * 2013-06-11 2016-12-02 Commissariat Energie Atomique REFLECTOMETRY METHOD FOR IDENTIFYING NON-FREE IMPACTS OF A CABLE
FR3026848B1 (en) 2014-10-02 2018-01-05 Commissariat A L'energie Atomique Et Aux Energies Alternatives METHOD FOR ANALYZING A CABLE BASED ON SELF-ADAPTIVE CORRELATION FOR DETECTING NON-FRAUD DEFECTS
FR3036494B1 (en) 2015-05-22 2017-05-19 Commissariat Energie Atomique CABLE ANALYSIS METHOD, INVOLVING SIGNATURE AMPLIFICATION PROCESSING OF NON-FRANC DEFECT

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Publication number Publication date
FR3138840A1 (en) 2024-02-16
WO2024033044A1 (en) 2024-02-15

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